Uranium Speciation in Solution by Time-Resolved Laser-Induced Fluorescence

1995 ◽  
Vol 67 (2) ◽  
pp. 348-353 ◽  
Author(s):  
Christophe. Moulin ◽  
Pierre. Decambox ◽  
Valerie. Moulin ◽  
Jean Gary. Decaillon
Keyword(s):  
Laser Induced Fluorescence ◽  
Time Resolved ◽  
Uranium Speciation

Uranium speciation studies at alkaline pH and in the presence of hydrogen peroxide using time-resolved laser-induced fluorescence spectroscopy

Polyhedron ◽  
2013 ◽  
Vol 55 ◽  
pp. 92-101 ◽  
Author(s):  
Albert Martínez-Torrents ◽  
Sandra Meca ◽  
Nils Baumann ◽  
Vicenç Martí ◽  
Javier Giménez ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Fluorescence Spectroscopy ◽  
Laser Induced Fluorescence ◽  
Alkaline Ph ◽  
Time Resolved ◽  
Uranium Speciation

Time-Resolved Laser-Induced Fluorescence as a Unique Tool for Low-Level Uranium Speciation

1998 ◽  
Vol 52 (4) ◽  
pp. 528-535 ◽  
Author(s):  
Christophe Moulin ◽  
Ivan Laszak ◽  
Valérie Moulin ◽  
Christian Tondre
Keyword(s):  
Ionic Strength ◽  
Uranium Concentration ◽  
Environmental Studies ◽  
Laser Induced Fluorescence ◽  
Time Resolved ◽  
Low Level ◽  
Carbonate Ions ◽  
Hydroxo Complexes ◽  
Uranium Speciation ◽  
Unique Method

Time-resolved laser-induced fluorescence is a unique method for direct uranium speciation at low level in the framework of environmental studies. By varying pH and uranium concentration in the absence of carbonate ions and at fixed ionic strength, it was possible, together with free uranyl UO22+, to identify spectrally and temporally all the uranium-hydroxo complexes, namely, UO2OH+, UO2(OH)2, UO2(OH)3−, (UO2)2(OH)22+, (UO2)3(OH)5+, and (UO2)3(OH)7−.

Measurements of the Collisionally Quenched Lifetime of CO in Hydrocarbon Flames

1994 ◽  
Vol 48 (9) ◽  
pp. 1118-1124 ◽  
Author(s):  
Sara Agrup ◽  
Marcus Aldén
Keyword(s):  
Laser Induced Fluorescence ◽  
Polyaromatic Hydrocarbon ◽  
Time Decay ◽  
Collisional Quenching ◽  
Time Resolved ◽  
Hydrocarbon Flames ◽  
Effective Lifetime ◽  
Ethylene Flame ◽  
Oxygen Flame ◽  
Different Parts

Time-resolved laser-induced fluorescence (LIF) from CO molecules in hydrocarbon flames was studied. Collisional quenching constants were evaluated on the basis of the exponential decays. Effective lifetime in a methane/oxygen flame was observed to vary between 250 and 400 ps depending on the position within the flame, and from 400 to 600 ps in the non-sooty parts of an ethylene/air flame. Fluorescence, constituting simultaneous spatially and temporally resolved decays, was also registered from various sections along a laser beam that probed different parts of the flame. Spectral recordings revealed not only the expected CO peaks but also, in the ethylene flame, laser-induced emission from C2 Swan bands and from polyaromatic hydrocarbon (PAH) emission that affected the fluorescence time decay in the sooty part of the flame.

scholarly journals Time-resolved laser-induced fluorescence spectroscopy as a diagnostic instrument in head and neck carcinoma

2010 ◽  
Vol 142 (6) ◽  
pp. 838-844 ◽  
Author(s):  
Jeremy D. Meier ◽  
Hongtao Xie ◽  
Yang Sun ◽  
Yinghua Sun ◽  
Nisa Hatami ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Head And Neck ◽  
Head And Neck Carcinoma ◽  
Laser Induced Fluorescence ◽  
Diagnostic Instrument ◽  
Time Resolved ◽  
Neck Carcinoma
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